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A graphene-based hybrid material with quantum bits prepared by the double Langmuir–Schaefer method

机译：基于石墨烯的混合材料，由双朗米尔 - 舍甫佛法制备量子位

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The scalability and stability of molecular qubits deposited on surfaces is a crucial step for incorporating them into upcoming electronic devices. Herein, we report on the preparation and characterisation of a molecular quantum bit, copper( II )dibenzoylmethane [Cu(dbm) _(2) ], deposited by a modified Langmuir–Schaefer (LS) technique onto a graphene-based substrate. A double LS deposition was used for the preparation of a few-layer-graphene (FLG) on a Si/SiO _(2) substrate with subsequent deposition of the molecules. Magnetic properties were probed by high-frequency electron spin resonance (HF-ESR) spectroscopy and found maintained after deposition. Additional spectroscopic and imaging techniques, such as Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and scanning electron microscopy (SEM) were performed to characterise the deposited sample. Our approach demonstrated the possibility to utilise a controlled wet-chemistry protocol to prepare an array of potential quantum bits on a disordered graphene-based substrate. The deployed spectroscopic techniques showed unambiguously the robustness of our studied system with a potential to fabricate large-scale, intact, and stable quantum bits.
机译：沉积在表面上的分子QUBits的可扩展性和稳定性是将它们结合到即将到来的电子设备中的关键步骤。在此，我们报告用改性的Langmuir-Schaefer（LS）技术在基于石墨烯基底物上沉积的分子量子钻头，铜（II）二苯甲酰甲烷[Cu（DBM）二苯甲酰甲烷[Cu（DBM）_（2）]的制备和表征。双LS沉积用于在Si / SiO_（2）衬底上制备几层 - 石墨烯（FLG），随后沉积分子。通过高频电子自旋共振（HF-ESR）光谱法探测磁性，并发现沉积后保持。进行另外的光谱和成像技术，例如拉曼光谱（RS），X射线光电子能谱（XPS），原子力显微镜（AFM）和扫描电子显微镜（SEM）以表征沉积的样品。我们的方法证明了利用受控的湿化化学方案来制备在无序的石墨烯基底物上制备势态阵列。部署的光谱技术显示了我们所研究的系统的鲁棒性，具有制造大规模，完整和稳定的量子位的潜力。

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